The viscosity of bovine bone marrow was measured using samples taken from proximal and distal sites of five radii. The viscosity was found to be independent of shear rate and temperature above 37°C (distal samples) and 42°C (proximal samples). The viscosity of all samples fell to a lower limit of 0.04 Pas above these temperatures, irrespective of the treatments used. Below them the measured viscosity of the proximal marrow was some ten times that of the distal marrow at 35°C and some 15 times that of the distal marrow at 30°C. Below 30°C the proximal marrow solidified. Distal marrow remained liquid to below 20°C.
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